Emergency feed stop for carburetors



. RITCHEY.

EMERGENCY FEED STOP FOR CARBUR ETORS. APPLICATION FILED Jun/2e. I921.

Patentefl 0c ATTORNEY.

IVAN J. RITCHEY, OF FRANKLIN, PENNSYLVANIA.

EMERGENCY FEED 8T0? FOR CABBUBETORS.

Application filed July 28, 1921. Serial No. 488,206.

T 0 all whom it may concern Be it known that 1, Ivan 5. Rrronnr, citizen of the United States, residing; at Franln lin, in the county of Venango and {state of Pennsylvania, have invented certain new and useful Improvements in Emergency Feed Stops for Carburetors, of which the following is specification.

The object, construction and operation of my improved feed-stop for carburetors are herein set forth with suliicient clearness to enable those skilled in the arts to which its construction and use respectively relate, to make and use the same.

The primary object of this invention is, to provide means for automatically closing the feed supply pipe to the carburetor of an internal combustion motor, so as to shut off the supply of fuel when back-fire occurs, thus lessening; the danger from fire.

The resulting economy in the consump tion of gasoline is a secondary object.

Essentially, my invention comprises a tubular valve body having a valve seat in each end thereof which seats face toward each other, one of said seats having relation to a port which is in communication with the intake manifold of the motor; the other of said seats having relation to a port which is in communication with the feed inlet to the carburetor; and a valve movable between said seats so as to close one or the other of said ports, said valve being automatically actuated to its open, feed position, by the fuel, inductive action i. e. by the suction of the motor and the resulting partial acuum in said inlet manifold; and to its stop or closed position both by gravity and by pressure in said manifold caused by back-fire of the motor.

In the drawings which form a part hereof, I have illustrated one simple form of mechanical embodiment of my emergency feed stop, together with two methods of utilizing same in the fuel supply system of a motor.

In said drawings:

Fig. l is a central, longitudinal section of my improved feed stop, showing the valve in the position which closes the feed to the carburetor.

F shows my improved stop interposed in the feed duct which leads directly from the fuel supply tank to the carburetor.

Fig. 3 shows said stop as used in connection with a vacuum feed tank, in cases where the main fuel supply tank is positioned lower than the curburetor.

The stop device proper, as shown in Fig. 1, comprises a tubular body or structure 1 having at one end thereof, (i.e., at the upper end, since the device usually operates in a vertical position) what is termed a vacuum chamber 2, and at the other end, a chamber 3, that is termed the feed chamber.

Said vacuum chamber 2 is supplied at its upper end with a port 4 adapted as a seat for a valve to close the same; said feed chamber is also supplied with a port 5 which is also adapted to be closed by a valve.

For the purpose of closing said ports 4tand 5, a valve is supplied which, as here illustrated, comprises a double-headed piston having a head 6, the end of which cooperates with port a, and a piston 7, the lower end of which is formed to cooperate with said port 5, which forms the outlet of said feed chamber 3.

Said pistons 6 and 7 are connected together in any suitable manner as by a rod 8, but they may be formed as a unitary structure.

The distance between the extremities of said valve,-(that is, the ends of pistons 6 and 7,) is somewhat less than the distance between the adjacent, valve-seating faces of said ports i and 5, so that said valve has a certain degree of longitudinal movement between their respective seating positions.

an inlet port 9 intersects the lower portion of said feed chamber 8 for the purpose of delivering motor fuel thereto by gravity from any suitable source of supply.

in Fig. 2 l have shown in a schematic manner a way in which my device may be connected into the fuel system of a motor, in cases where the main fuel supply tank is high enough to cause the fuel to gravitate to the carburetor. In this view my stop device is indicated by the ordinal 1, the main supply tank by the ordinal 10, from which a supply pipe 11 leads to said inlet port 9 of the feed chamber 3; a supply pipe 12 leads from the lower portion of said chan ber 23 below port 5 to the carburetor 13. A suction or vacuum pipe 1% leads from the intake manifold 15 of the motor into the valve body 1, above the port t.

The operation is then as follows. Then it is desired to start, the motor port 5 may be opened by manually raising the valve from port 5 by means of the manipulating pin 16,

which projects and operates through the slot Or, said valve may be automatically raised by cranking the motor, to-which it may be attached.

As shown, as the motor starts operating, the suction, which is communicated from the intake manifold to chamber 2, raises and holds said valve in the upward'limit of its travel and against the seat of port 4, thus affording free passage of the motor fuel from tank 10, through pipe 11, feed chamber 3, and pipe 12, to thecarburetor.

In case back-fire occurs from the motor, the consequent pressure in manifold 15 drives the valve of my device down so that it seats in port 5, and closing off the supply of gasoline, thus preventing fire from the ignition of gasoline which might otherwise continue to flow.

It is not, however, necessary that a pres sure should be developed within said chamher 2 in order to cause the valve structure to drop and shut off the supply of gasoline, as the action of gravity alone will cause said valve structure to drop and close port 5, as soon as suction in said chamber 2 ceases.

In Fig; 3 is illustrated an arrangement of my feed stop in cases where a vacuum tank, as 14, is employed.

The construction, utility and operation of said vacuum tank is well known to those skilled in "the art to which it relates, hence it needs not be described here, it being deemed sufficient to state that it is employed in many cases where the main supply tank is positioned, below the carburetor. Said vacuum tank is located in such a position thatgasoline will flow from it to the carburetor by gravity and the gasoline is drawn to said vacuum tank by means of a suction pipe which communicates with the intake manifold of the motor similar to pipe 14-. In said Fig. 3, said pipe is indicated by the ordinal 14, but if so desired, two pipes instead of one could be used-one leading from said manifold 15 to my stop valve, and the other from said manifold to the vacuum tank. The pipe 18 leads to the main fuel supply tank, which is usually, in automobiles, located at the rear of the frame.

ing positions by suction, and to the other of said closing positions by gravity as and for the purpose set forth.

2. An emergency feed stop for carburetors, comprising in combination, a tubular body having a. suction port at one end thereof in communication with the intake manifold of a motor, a. feed port at the other end thereof in communication with the feed inlet of a carburetor which is connected to said manifold, a source of motive agent supply having communication with said carburetor through saidfeed port, and a valve within said tubular body cooperating with said feed port, arranged to be actuated by the suction in said manifold so as to open said feed port, and to close the same when said suction ceases.

3. An emergency feed stop for carburetorscomprising a. tubular body having a vacuum chamber atone end thereof in communication with the intake manifold of a motor, a valve in said chamber arranged to be actuated by suction in said manifold, a feed chamber in the other end of said body in communication with a source of fuel supply and with the fuel intake of a carburetor, a valve in said barrel connected to said firstmentioned valve so as tobe actuated thereby; said action of said valvesbeing such that said manifold suction opens communication from said feed chamber to said carburetor inlet, and closes said communication when back-fire of said motor occurs.

In testimony whereof I affix my signature.

IVAN J. RITCHEY". 

